class Solution {
public:
    
    char findTheDifference(string s, string t) {
        int sum1 = 0, sum2 = 0;
        for (char ch: s) {
            sum1 += ch;
        }
        for (char ch: t) {
            sum2 += ch;
        }
        return sum2-sum1;
    }

    
};
